From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sagar Arun Kamble Subject: Re: [PATCH v3] drm/i915: Use exponential backoff for wait_for() Date: Wed, 22 Nov 2017 13:11:02 +0530 Message-ID: <38bceea3-7a11-c57d-ebcd-e4fa38cfb17a@intel.com> References: <20171121152454.417-1-chris@chris-wilson.co.uk> <20171121205951.31729-1-chris@chris-wilson.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5E2966E5F0 for ; Wed, 22 Nov 2017 07:41:05 +0000 (UTC) In-Reply-To: <20171121205951.31729-1-chris@chris-wilson.co.uk> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Chris Wilson , intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org CgpPbiAxMS8yMi8yMDE3IDI6MjkgQU0sIENocmlzIFdpbHNvbiB3cm90ZToKPiBJbnN0ZWFkIG9m IHNsZWVwaW5nIGZvciBhIGZpeGVkIDFtcyAocm91Z2hseSwgZGVwZW5kaW5nIG9uIHRpbWVyIHNs YWNrKSwKPiBzdGFydCB3aXRoIGEgc21hbGwgc2xlZXAgYW5kIGV4cG9uZW50aWFsbHkgaW5jcmVh c2UgdGhlIHNsZWVwIG9uIGVhY2gKPiBjeWNsZS4KPgo+IEEgZ29vZCBleGFtcGxlIG9mIGEgYmVu ZWZpY2lhcnkgaXMgdGhlIGd1YyBtbWlvIGNvbW11bmljYXRpb24gY2hhbm5lbC4KQXMgVHZydGtv IHNhaWQsIGZvciB0aGUgY3VycmVudCBHdUMgY29tbXVuaWNhdGlvbiAoZ3VjX3NlbmRfbW1pbykg d2UgCndpbGwgbmVlZCB0byB1cGRhdGUgZmFzdCB0aW1lb3V0IG9mCl9faW50ZWxfd2FpdF9mb3Jf cmVnaXN0ZXIgdG8gMjB1cy4gSW1wcm92ZW1lbnQgdGhpcyBwYXRjaCBwcm9wb3NlcyAKdGhyb3Vn aCB3YWl0X2ZvciB3aWxsCmNlcnRhaW5seSBiZSBzZWVuIG9uY2Ugd2Ugc3dpdGNoIG92ZXIgdG8g R3VDIENULiBNYXkgYmUgc3BlY2lmeWluZyAiR3VDIApDVCBjaGFubmVsIiBoZXJlIGlzIGFwdC4K PiBUeXBpY2FsbHkgd2UgZXhwZWN0IChhbmQgc28gc3BpbikgZm9yIDEwdXMgZm9yIGEgcXVpY2sg cmVzcG9uc2UsIGJ1dCB0aGlzCj4gZG9lc24ndCBjb3ZlciBldmVyeXRoaW5nIGFuZCBzbyBzb21l dGltZXMgd2UgZmFsbGJhY2sgdG8gdGhlIG1pbGxpc2Vjb25kKwo+IHNsZWVwLiBUaGlzIGluY3Vy cyBhIHNpZ25pZmljYW50IGRlbGF5IGluIHRpbWUtY3JpdGljYWwgb3BlcmF0aW9ucyBsaWtlCj4g cHJlZW1wdGlvbiAoaWd0L2dlbV9leGVjX2xhdGVuY3kpLCB3aGljaCBjYW4gYmUgaW1wcm92ZWQg c2lnbmlmaWNhbnRseSBieQo+IHVzaW5nIGEgc21hbGwgc2xlZXAgYWZ0ZXIgdGhlIHNwaW4gZmFp bHMuCj4KPiBXZSd2ZSBtYWRlIHRoaXMgc3VnZ2VzdGlvbiBtYW55IHRpbWVzLCBidXQgaGFkIGxp dHRsZSBleHBlcmltZW50YWwgZGF0YQo+IHRvIHN1cHBvcnQgYWRkaW5nIHRoZSBjb21wbGV4aXR5 Lgo+Cj4gdjI6IEJ1bXAgdGhlIG1pbmltdW0gdXNsZWVwIHRvIDEwdXMgb24gYWR2aWNlIG9mCj4g RG9jdW1lbnRhdGlvbi90aW1lcnMvdGltZXJzLWhvd3RvLnR4dCAoVHZya28pCj4gdjM6IFNwZWNp ZnkgbWluLCBtYXggcmFuZ2UgZm9yIHVzbGVlcCBpbnRlcnZhbHMgLS0gc29tZSBjb2RlIG1heQo+ IGNydWNpYWxseSBkZXBlbmQgdXBvbiBhbmQgc28gd2FudCB0byBzcGVjaWZ5IHRoZSBzbGVlcCBw YXR0ZXJuLgo+Cj4gUmVmZXJlbmNlczogMTc1OGI5MGUzOGY1ICgiZHJtL2k5MTU6IFVzZSBhIGh5 YnJpZCBzY2hlbWUgZm9yIGZhc3QgcmVnaXN0ZXIgd2FpdHMiKQo+IFNpZ25lZC1vZmYtYnk6IENo cmlzIFdpbHNvbiA8Y2hyaXNAY2hyaXMtd2lsc29uLmNvLnVrPgo+IENjOiBUdnJ0a28gVXJzdWxp biA8dHZydGtvLnVyc3VsaW5AaW50ZWwuY29tPgo+IENjOiBKb2huIEhhcnJpc29uIDxKb2huLkMu SGFycmlzb25AaW50ZWwuY29tPgo+IENjOiBNaWNoYcWCIFdpbmlhcnNraSA8bWljaGFsLndpbmlh cnNraUBpbnRlbC5jb20+Cj4gQ2M6IFZpbGxlIFN5cmphbGEgPHZpbGxlLnN5cmphbGFAbGludXgu aW50ZWwuY29tPgo+IC0tLQo+ICAgZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHJ2LmggfCAx MSArKysrKysrLS0tLQo+ICAgZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfcG0uYyAgfCAgMiAr LQo+ICAgMiBmaWxlcyBjaGFuZ2VkLCA4IGluc2VydGlvbnMoKyksIDUgZGVsZXRpb25zKC0pCj4K PiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHJ2LmggYi9kcml2ZXJz L2dwdS9kcm0vaTkxNS9pbnRlbF9kcnYuaAo+IGluZGV4IDYzNWE5NmZjZDc4OC4uYzAwNDQxYTNk NjQ5IDEwMDY0NAo+IC0tLSBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2Rydi5oCj4gKysr IGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHJ2LmgKPiBAQCAtNDgsOCArNDgsOSBAQAo+ ICAgICogaGF2aW5nIHRpbWVkIG91dCwgc2luY2UgdGhlIHRpbWVvdXQgY291bGQgYmUgZHVlIHRv IHByZWVtcHRpb24gb3Igc2ltaWxhciBhbmQKPiAgICAqIHdlJ3ZlIG5ldmVyIGhhZCBhIGNoYW5j ZSB0byBjaGVjayB0aGUgY29uZGl0aW9uIGJlZm9yZSB0aGUgdGltZW91dC4KPiAgICAqLwo+IC0j ZGVmaW5lIF93YWl0X2ZvcihDT05ELCBVUywgVykgKHsgXAo+ICsjZGVmaW5lIF93YWl0X2ZvcihD T05ELCBVUywgV21pbiwgV21heCkgKHsgXAo+ICAgCXVuc2lnbmVkIGxvbmcgdGltZW91dF9fID0g amlmZmllcyArIHVzZWNzX3RvX2ppZmZpZXMoVVMpICsgMTsJXAo+ICsJbG9uZyB3YWl0X18gPSAo V21pbik7IC8qIHJlY29tbWVuZGVkIG1pbiBmb3IgdXNsZWVwIGlzIDEwIHVzICovCVwKPiAgIAlp bnQgcmV0X187CQkJCQkJCVwKPiAgIAltaWdodF9zbGVlcCgpOwkJCQkJCQlcCj4gICAJZm9yICg7 OykgewkJCQkJCQlcCj4gQEAgLTYyLDEyICs2MywxNCBAQAo+ICAgCQkJcmV0X18gPSAtRVRJTUVE T1VUOwkJCQlcCj4gICAJCQlicmVhazsJCQkJCQlcCj4gICAJCX0JCQkJCQkJXAo+IC0JCXVzbGVl cF9yYW5nZSgoVyksIChXKSAqIDIpOwkJCQlcCj4gKwkJdXNsZWVwX3JhbmdlKHdhaXRfXywgd2Fp dF9fICogMik7CQkJXAo+ICsJCWlmICh3YWl0X18gPCAoV21heCkpCQkJCQlcCj4gKwkJCXdhaXRf XyA8PD0gMTsJCQkJCVwKSSB0aGluayB3ZSBuZWVkIHRvIGtlZXAgdHJhY2sgb2YgdG90YWwgdGlt ZSB3ZSBoYXZlIHdhaXRlZCBlbHNlIHdlIG1pZ2h0IAp3YWl0IGZvciBsb25nZXIgdGhhbiBuZWNl c3NhcnkuCkZvciBlLmcuIGZvciB3YWl0X2Zvcl91cyhDT05ELCA5MDApIHRoaXMgYXBwcm9hY2gg bWlnaHQgYWN0dWFsbHkgbGVhZCB0byAKc2xlZXAgb2YgMTI3MHVzLgo+ICAgCX0JCQkJCQkJCVwK PiAgIAlyZXRfXzsJCQkJCQkJCVwKPiAgIH0pCj4gICAKPiAtI2RlZmluZSB3YWl0X2ZvcihDT05E LCBNUykJICAJX3dhaXRfZm9yKChDT05EKSwgKE1TKSAqIDEwMDAsIDEwMDApCj4gKyNkZWZpbmUg d2FpdF9mb3IoQ09ORCwgTVMpCV93YWl0X2ZvcigoQ09ORCksIChNUykgKiAxMDAwLCAxMCwgMTAw MCkKPiAgIAo+ICAgLyogSWYgQ09ORklHX1BSRUVNUFRfQ09VTlQgaXMgZGlzYWJsZWQsIGluX2F0 b21pYygpIGFsd2F5cyByZXBvcnRzIGZhbHNlLiAqLwo+ICAgI2lmIGRlZmluZWQoQ09ORklHX0RS TV9JOTE1X0RFQlVHKSAmJiBkZWZpbmVkKENPTkZJR19QUkVFTVBUX0NPVU5UKQo+IEBAIC0xMTYs NyArMTE5LDcgQEAKPiAgIAlpbnQgcmV0X187IFwKPiAgIAlCVUlMRF9CVUdfT04oIV9fYnVpbHRp bl9jb25zdGFudF9wKFVTKSk7IFwKPiAgIAlpZiAoKFVTKSA+IDEwKSBcCj4gLQkJcmV0X18gPSBf d2FpdF9mb3IoKENPTkQpLCAoVVMpLCAxMCk7IFwKPiArCQlyZXRfXyA9IF93YWl0X2ZvcigoQ09O RCksIChVUyksIDEwLCAxMCk7IFwKPiAgIAllbHNlIFwKPiAgIAkJcmV0X18gPSBfd2FpdF9mb3Jf YXRvbWljKChDT05EKSwgKFVTKSwgMCk7IFwKPiAgIAlyZXRfXzsgXAo+IGRpZmYgLS1naXQgYS9k cml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9wbS5jIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50 ZWxfcG0uYwo+IGluZGV4IGU0NDVlYzE3NDgzMS4uZjA3ZjE0YWUxOThkIDEwMDY0NAo+IC0tLSBh L2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3BtLmMKPiArKysgYi9kcml2ZXJzL2dwdS9kcm0v aTkxNS9pbnRlbF9wbS5jCj4gQEAgLTkyOTQsNyArOTI5NCw3IEBAIGludCBza2xfcGNvZGVfcmVx dWVzdChzdHJ1Y3QgZHJtX2k5MTVfcHJpdmF0ZSAqZGV2X3ByaXYsIHUzMiBtYm94LCB1MzIgcmVx dWVzdCwKPiAgIAkJcmV0ID0gMDsKPiAgIAkJZ290byBvdXQ7Cj4gICAJfQo+IC0JcmV0ID0gX3dh aXRfZm9yKENPTkQsIHRpbWVvdXRfYmFzZV9tcyAqIDEwMDAsIDEwKTsKPiArCXJldCA9IF93YWl0 X2ZvcihDT05ELCB0aW1lb3V0X2Jhc2VfbXMgKiAxMDAwLCAxMCwgMTApOwo+ICAgCWlmICghcmV0 KQo+ICAgCQlnb3RvIG91dDsKPiAgIAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJl ZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGlu Zm8vaW50ZWwtZ2Z4Cg==